If I occasionally want more hours of transcription in a month than my Scribbbe AS LTD plan, I can buy more credits from Scribbbe at 50% off the current RRP and they won't expire after one month?
e.g. I buy an extra 10 hours for USD 60 (50% off RRP) and I will not lose any unused hours and they will not get used unless I run out of my monthly AS LTD plan's hours.